/ Dictionary / Index S sieve of Eratosthenes: Meaning and Definition of Find definitions for: sieve' of Eratos'thenes Pronunciation: [key] — Math. Math. a method of obtaining prime numbers by sifting out the composite numbers from the set of natural numbers so that only prime numbers remain. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. sieve cell Sievers Related Content Daily Word Quiz: fidelity Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language